Activity of technetium-99 in 24 hours
Time (h) 0 3 6 9 12 15 18 21 24
Acivity (kBq) 17.0 12.2 8.9 6.5 4.5 3.2 2.3 1.5 1.1

determine the half life of technetium-99

Question

Activity of technetium-99 in 24 hours
Time (h) 	 0	3	6	9	12	15	18	21	24
Acivity (kBq)       17.0	12.2	8.9	6.5	4.5	3.2	2.3	1.5	1.1

determine the half life of technetium-99

karlaltr · Answer

HEeres a better picture of the graph

karlaltr · Answer

i will fan and medal PLEASE HELP

anonymous · Answer

what music u listen to

karlaltr · Answer

can you help me with this question? :p but i listen to hiphop and rap....anytime of music is what i listen to tbh

dariusx · Answer

T=ln2/λ=0.693/λ


when t = 0, N = No

n = m/M

M = 99g/mol

N = n * Na

Na = 6,02 * 10^23,

A=λ∗N



idk, how to solve it fully, but imma throw some formulas here. maybe someone will find them useful and will help you. 
if i knew 'm' i could solve it

karlaltr · Answer

its really confusing since we dont have m, theres now way of finding it!

karlaltr · Answer

but thank you so much!

karlaltr · Answer

Idk if this wil help but the formula My teacher provided was A=A0(1/2) t/h